Improvement in lock-hinges



m.l 1. ALSTOM.

' lLimia-Hinges.

Patented Oct-27,1874t UNITED STATES PATENT OFFICEn ANDREW J. ALSTON, OF ALLEGHENY, PENNSYLVANIA.

IMPROVEMENT IN L'OCK-HINGES.

Specification forming part of Letters Patent No. 156,325., dated October 27, 1874; application filed December 19, 1873.

To all whom it may concern:

Be it known Jthat I, ANDREW J. ALsToN, of the city and county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Shutter-Hinges; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to the accompanying 'drawings, and to the letters of reference marked thereon.

My invention relates ,to an improvement in lock-hinges; and consists in two cam-shaped projections at the base of the pintle, and a projection forming a section oi' a circle, in combination with cam-faced projections on each end of the part which surrounds the pintle, ltogether with locking-shoulders, all constructed and arranged as hereinafter more fully described, and then pointed out in the claim.

To enable others skilled in the art to make and use my invention, I will proceed tol describe its construction and operation.

In the accompanying drawings, which form part of my specification, Figure l is a perspective view of the female part of the hinge, A being a detail view of the ends of the part which is placed over the pintle.v Fig. 2 is a perspective view of the male part of the hinge, B being a detail view of the part at the base of the pintle.

A represents the part of the hinge which is secured in the Window-frame, and G the projecting part which supports the pintle f. B represents the part of the hinge which is secured to the window-shutters, and D the part which is placed over the pint-le f. At the base of the pintle are two projections with incline sides, k l, m n, and also a projection, j, which is a section of a circle. On the part D of the female part of the hinge are two projections, in the form of one-half of an ellipse. On each end of the part D, which is placed over the pintle, is a projection, t'. E represents the opening for the pintle f.

The two parts of the hinge being placed together, and the shutter opened and turned back against the wall of the building, the projection t' will rest on the part O; and in closing the shutter, the projections g and h will travel up the incline sides m and l of the projections at the base of the pintle f, causing the shutter to rise, sothat when the shutter is closed the part t' will rest on the part j. In closing the left-hand shutter, the projections g and It travel up the inclines n and la.. The hinges are locked by the shoulders s of part t' coming in contact with the shoulders t of the part j.

Having thus described my improvement, what I claim is- In a shutter-hinge, the two cam-faced projections on part C at the base of the pintle f,-

having incline sides k l, m n, and the projection j, forming the section of a circle, in combination with the cam-faced projections g h and the projection i on each end ofthe part D, which surrounds the pintle, together with the locking-shoulders s t, all substantially as described and shown, for the purpose set forth.

j ANDREW J. ALSTON. Witnesses:

A. C. JoHNsToN,

J Aivrss J. J oHNsToN. 

